Roasting-furnace



A. R. MEYER.

ROASTING FURNACE.

APPLICATION FILED SEPT. 2a, 1903.

N0 MODEL.-

wane/am Z SHEETS-SHEET 1.

' PATENTED FEB. 2, 1904. I

2 sums-sum 2 V A. R. MEYER. ROASTING FURNACE. APPLiUATION FILED SEPT. 28, 1903.

No, 750,877. Q

N0 MODEL.

J u a M 1 4. 3 m i4 5. \\\\\\\\\\\\\\\\\\\\\\\\\.f, w w W 2 5 m m n Patented February 2, 1904.

PATENT OFFICE.

AUGUST R. MEYER, OF KANSAS CITY, MISSOURI.

ROASTING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 750,877, dated. February 2, 1904.

Application filed September 28, 1903. Serial No. 174,901. (No model.)

To aZZ whom it may concern.-

Be it known that 1, AUGUST R. MEYER, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Roasting- Furnaces, of which the following is a specification.

My invention relates to apparatus in which rotating or rocking shafts are provided with radial arms, and more particularly to the shafts and rabble-arms of roasting-furnaces; and my invention consists in making the shaft in two concentric sections and in supporting the arms in both sections, so as to secure a strong and unyielding support, as fully set forth hereinafter and as illustrated in the accompanying drawings, in which Figure 1 is asectional elevation of sufllcient of a roasting-furnace to illustrate my improved connecting means. Fig. 2 is avertical section, enlarged, of one section of the apparatus; and Fig. 3 is a sectional plan on the line 3 3, Fig. 2.

The shaft A, as shown, is the vertical shaft of a roasting-furnace and consists of an outer tube or shell 1 and a concentrictube or shell 2, the two parts being connected, so as to rotate together, and being constructed in any suitable manner; but preferably the inner section is tubular, and this composite shaft constitutes a support for the radial rabble-arms or rabbles S, each of which has aprojection or stem 3 adapted to extend through an opening 4 in the outer shell 1 and into a socket 5 of the inner section or tube 2, and when the latter is hollow the arms S may also be hollow to permit the passage of air through the arms and into the inner tube. In this case also the inner tube may have ports 6 at the lower end, so that the air may pass from the bottom of the inner tube upward betweenthe tubes to outlet-ports 7 at the top, thus cooling the parts. By providing coinciding sockets in the inner and outer sections of the shaft for the stems 3 of the arms S such extended supports for the said arms are secured that there is comparatively no chance of their becoming loosened by the back thrust exerted in the operation of the apparatus and the breakage of the arms and fracture of the parts of the shafts into which the stems of the arms extend, which occurs frequently in ordinary constructions, are avoided. The construction illustrated and described also avoids the loss oftime resulting from the means frequently employed of connecting the arms to the shaft by means of bolts, which are depended upon to resist the strains in operation. Preferably the ends of the stems are tapering, and the sockets in the sections of the shaft are adapted thereto, so that a tight joint may be secured without interfering with the ready introduction and removal of the stems. With the parts thus constructed there may be employed any suitable securing meansas, for instance, a lug 8upon the inner end of each stem adapted to enter a curved groove 9 in the socket of the inner shaft-section and the groove being inclined, so that when the arm is turned the end of the stem is carried inward. To further insure a fixed connection of the parts, a bolt 10 may extend longitudinally through each arm, its head bearing on the outer end of the latter and its inner end threaded to fit a socket in a cen tral air-pipe D when the latter is employed.

To facilitate construction, the inner section may consist of a series of short sleeves 13, with flanges through which bolts may be passed to connect them together end to end, and the sleeves, which are opposite the sockets in the outer section, being provided with coinciding sockets.

It will be evident that although I have shown the improved means for connecting the shaft and rabble-arms as adapted for furnace constructions such means of connection may be employed in other cases where rotating or rocking shafts are to be provided with radial arms and that by means of the support described it is possible to secure such a firm and unyielding connection between the shafts and arms that the latter may be of greater length and in the case of roasting-furnaces permit of furnaces of larger diameter and greater roasting capacity than with ordinary constructions.

Without limiting myself to the construction shown, I claim- 1. A shaft having inner and outer concentric sections with coinciding sockets, combined with radial arms having stems fitting said coinciding sockets, and means for retaining the parts in connection, substantially as set forth.

2. The combination with a shaft having inner and outer concentric sections with coinciding sockets and grooves, of arms having stems adapted to said sockets and lugs adapted to said grooves, substantially as set forth.

3. The combination with a shaft having inner and outer concentric sections, with coinciding sockets, and inclined grooves, of arms having stems adapted to said sockets and lugs adapted to said grooves, substantially as set forth.

4:. A shaft consisting of two concentric tubes with coinciding sockets, combined with arms having stems adapted to said sockets, and means for holding the stems in the sockets, substantially as set forth.

5. A shaft consisting of two concentric tubes with coinciding sockets combined with hollow arms having stems adapted to said sockets, and means for holding the stems in the sockets, substantially as set forth.

6. The combination with the hearths of a roasting-furnace, of a shaft having inner and outer concentric sections and coinciding sockets, radial rabble-arms having stems adapted to said sockets, and means for holding the stems in the sockets, substantially as set forth.

7 The combination with the hearths of a roasting-furnace, of a shaft having inner and outer concentric tubular sections and coinciding sockets,'radial hollow rabble-arms having stems adapted to said sockets, and means for holding the stems in the sockets, with ports between the arms and inner section, substantially as set forth.

8. The combination of the outer tubular shaft-section 1, inner section consisting of a series of connected sleeves, said inner and outer sections having coinciding sockets, radial arms having stems adapted to the sockets of both sections, and means for holding the arms in position, substantially as described.

9. The combination with the shaft of a furnace, consisting of concentric socketed tubular sections, of radial arms having stems fitting the sockets of both sections, an inner air-pipe, and bolts extending longitudinally through the arms and connected to said air-pipe, substantially as set forth.

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing witnesses.

AUGUST R. MEYER.

Witnesses:

W. J. MoCoR'r, E. B. SHAW. 

